package?com.gloomyfish.image.compare;

import?java.awt.image.BufferedImage;

public?class?HistogramFilter?{
	
	private?int?redBins;
	private?int?greenBins;
	private?int?blueBins;
	
	public?HistogramFilter（）?{
		redBins?=?greenBins?=?blueBins?=?4;
	}
	
	public?void?setRedBinCount（int?redBinCount）?{
		this.redBins?=?redBinCount;
	}

	public?void?setGreenBinCount（int?greenBinCount）?{
		this.greenBins?=?greenBinCount;
	}

	public?void?setBlueBinCount（int?blueBinCount）?{
		this.blueBins?=?blueBinCount;
	}

	public?float[]?filter（BufferedImage?src?BufferedImage?dest）?{
		int?width?=?src.getWidth（）;
????????int?height?=?src.getHeight（）;
????????
????????int[]?inPixels?=?new?int[width*height];
????????float[]?histogramData?=?new?float[redBins?*?greenBins?*?blueBins];
????????getRGB（?src?0?0?width?height?inPixels?）;
????????int?index?=?0;
????????int?redIdx?=?0?greenIdx?=?0?blueIdx?=?0;
????????int?singleIndex?=?0;
????????float?total?=?0;
????????for（int?row=0;?row????????	int?ta?=?0?tr?=?0?tg?=?0?tb?=?0;
????????	for（int?col=0;?col????????		index?=?row?*?width?+?col;
????????		ta?=?（inPixels[index]?>>?24）?&?0xff;
????????????????tr?=?（inPixels[index]?>>?16）?&?0xff;
????????????????tg?=?（inPixels[index]?>>?8）?&?0xff;
????????????????tb?=?inPixels[index]?&?0xff;
????????????????redIdx?=?（int）getBinIndex（redBins?tr?255）;
????????????????greenIdx?=?（int）getBinIndex（greenBins?tg?255）;
????????????????blueIdx?=?（int）getBinIndex（blueBins?tb?255）;
????????????????singleIndex?=?redIdx?+?greenIdx?*?redBins?+?blueIdx?*?redBins?*?greenBins;
????????????????histogramData[singleIndex]?+=?1;
????????????????total?+=?1;
????????	}
????????}
????????
????????//?start?to?normalize?the?histogram?data
????????for?（int?i?=?0;?i?????????{
????????	histogramData[i]?=?histogramData[i]?/?total;
????????}
????????
????????return?histogramData;
	}

	private?float?getBinIndex（int?binCount?int?color?int?colorMaxValue）?{
		float?binIndex?=?（（（float）color）/（（float）colorMaxValue））?*?（（float）binCount）;
		if（binIndex?>=?binCount）
			binIndex?=?binCount??-?1;
		return?binIndex;
	}
	
	public?int[]?getRGB（?BufferedImage?image?int?x?int?y?int?width?int?height?int[]?pixels?）?{
		int?type?=?image.getType（）;
		if?（?type?==?BufferedImage.TYPE_INT_ARGB?||?type?==?BufferedImage.TYPE_INT_RGB?）
			return?（int?[]）image.getRaster（）.getDataElements（?x?y?width?height?pixels?）;
		return?image.getRGB（?x?y?width?height?pixels?0?width?）;
????}

}

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????文件????????4341??2012-07-21?23:49??ImageComparerUI.java
?????文件????????1087??2012-07-21?16:19??ImageComparer.java
?????文件????????2606??2012-07-21?15:55??HistogramFilter.java